Merge branch '487-reenable-trends-diagnostics' into 'main'

Resolve "Trends diagnostics may not be scientifically correct in RK3" (2)

Closes #487

See merge request !756

src/OCE/TRD/trdini.F90

@@ -76,13 +76,10 @@ CONTAINS
       IF ( ln_dyn_trd .OR. ln_KE_trd .OR. ln_dyn_mxl .OR.   &
          & ln_vor_trd .OR. ln_glo_trd                       )   l_trddyn = .TRUE.
       !
-      ! #487: the trends diagnostics are functional (they don't crash), but they may not be scientifically valid in RK3.
-      ! They are disabled, pending a full review.
-      IF( l_trdtra .OR. l_trddyn ) THEN
-         CALL ctl_warn('The trends diagnostics are disabled, pending a full review.')
-         l_trdtra = .FALSE.
-         l_trddyn = .FALSE.
-         RETURN
+      ! #487: the trends diagnostics are functional (they don't crash), but they may not be scientifically valid in RK3
+      !       and generally need further development
+      IF( l_trdtra .OR. l_trddyn .OR. l_trdtrc ) THEN
+         CALL ctl_warn('The trends diagnostics are a work in progress: they are not yet fully tested or functional')
       ENDIF
 
 !!gm check the stop below